Cyanobacteria or Blue-green algae is present in almost all lakes in Canada, and the same is true for Lake Erie.  In the warmer sunny days that UWSS experiences in the summer blue-green algae can form in the source water.  The article “The dangers of blue-green algae: what you need to know” on the CBC website provides a thorough explanation of what blue-green algae is.  Please be assured that UWSS is continuously monitoring for blue-green algae in the warmer months to ensure processes can be adjusted if the need arises to ensure that your drinking water remains safe.